diff options
| author | Kirill Volinsky <mataes2007@gmail.com> | 2012-07-20 16:21:49 +0000 |
|---|---|---|
| committer | Kirill Volinsky <mataes2007@gmail.com> | 2012-07-20 16:21:49 +0000 |
| commit | f424a18112032cf61d2871a6b91a5af607c171ae (patch) | |
| tree | 88fedc4e28941ceecda7026f0b06eba6271f91d5 /plugins/CryptoPP/crypto/pssr.cpp | |
| parent | bfe1bd0fc087be44c70904aee0fe4276643d206d (diff) | |
CryptoPP:
changed folder structure
git-svn-id: http://svn.miranda-ng.org/main/trunk@1083 1316c22d-e87f-b044-9b9b-93d7a3e3ba9c
Diffstat (limited to 'plugins/CryptoPP/crypto/pssr.cpp')
| -rw-r--r-- | plugins/CryptoPP/crypto/pssr.cpp | 145 |
1 files changed, 0 insertions, 145 deletions
diff --git a/plugins/CryptoPP/crypto/pssr.cpp b/plugins/CryptoPP/crypto/pssr.cpp deleted file mode 100644 index 34ce71aed6..0000000000 --- a/plugins/CryptoPP/crypto/pssr.cpp +++ /dev/null @@ -1,145 +0,0 @@ -// pssr.cpp - written and placed in the public domain by Wei Dai
-
-#include "pch.h"
-#include "pssr.h"
-#include <functional>
-
-NAMESPACE_BEGIN(CryptoPP)
-
-// more in dll.cpp
-template<> const byte EMSA2HashId<RIPEMD160>::id = 0x31;
-template<> const byte EMSA2HashId<RIPEMD128>::id = 0x32;
-template<> const byte EMSA2HashId<Whirlpool>::id = 0x37;
-
-#ifndef CRYPTOPP_IMPORTS
-
-size_t PSSR_MEM_Base::MinRepresentativeBitLength(size_t hashIdentifierLength, size_t digestLength) const
-{
- size_t saltLen = SaltLen(digestLength);
- size_t minPadLen = MinPadLen(digestLength);
- return 9 + 8*(minPadLen + saltLen + digestLength + hashIdentifierLength);
-}
-
-size_t PSSR_MEM_Base::MaxRecoverableLength(size_t representativeBitLength, size_t hashIdentifierLength, size_t digestLength) const
-{
- if (AllowRecovery())
- return SaturatingSubtract(representativeBitLength, MinRepresentativeBitLength(hashIdentifierLength, digestLength)) / 8;
- return 0;
-}
-
-bool PSSR_MEM_Base::IsProbabilistic() const
-{
- return SaltLen(1) > 0;
-}
-
-bool PSSR_MEM_Base::AllowNonrecoverablePart() const
-{
- return true;
-}
-
-bool PSSR_MEM_Base::RecoverablePartFirst() const
-{
- return false;
-}
-
-void PSSR_MEM_Base::ComputeMessageRepresentative(RandomNumberGenerator &rng,
- const byte *recoverableMessage, size_t recoverableMessageLength,
- HashTransformation &hash, HashIdentifier hashIdentifier, bool messageEmpty,
- byte *representative, size_t representativeBitLength) const
-{
- assert(representativeBitLength >= MinRepresentativeBitLength(hashIdentifier.second, hash.DigestSize()));
-
- const size_t u = hashIdentifier.second + 1;
- const size_t representativeByteLength = BitsToBytes(representativeBitLength);
- const size_t digestSize = hash.DigestSize();
- const size_t saltSize = SaltLen(digestSize);
- byte *const h = representative + representativeByteLength - u - digestSize;
-
- SecByteBlock digest(digestSize), salt(saltSize);
- hash.Final(digest);
- rng.GenerateBlock(salt, saltSize);
-
- // compute H = hash of M'
- byte c[8];
- PutWord(false, BIG_ENDIAN_ORDER, c, (word32)SafeRightShift<29>(recoverableMessageLength));
- PutWord(false, BIG_ENDIAN_ORDER, c+4, word32(recoverableMessageLength << 3));
- hash.Update(c, 8);
- hash.Update(recoverableMessage, recoverableMessageLength);
- hash.Update(digest, digestSize);
- hash.Update(salt, saltSize);
- hash.Final(h);
-
- // compute representative
- GetMGF().GenerateAndMask(hash, representative, representativeByteLength - u - digestSize, h, digestSize, false);
- byte *xorStart = representative + representativeByteLength - u - digestSize - salt.size() - recoverableMessageLength - 1;
- xorStart[0] ^= 1;
- xorbuf(xorStart + 1, recoverableMessage, recoverableMessageLength);
- xorbuf(xorStart + 1 + recoverableMessageLength, salt, salt.size());
- memcpy(representative + representativeByteLength - u, hashIdentifier.first, hashIdentifier.second);
- representative[representativeByteLength - 1] = hashIdentifier.second ? 0xcc : 0xbc;
- if (representativeBitLength % 8 != 0)
- representative[0] = (byte)Crop(representative[0], representativeBitLength % 8);
-}
-
-DecodingResult PSSR_MEM_Base::RecoverMessageFromRepresentative(
- HashTransformation &hash, HashIdentifier hashIdentifier, bool messageEmpty,
- byte *representative, size_t representativeBitLength,
- byte *recoverableMessage) const
-{
- assert(representativeBitLength >= MinRepresentativeBitLength(hashIdentifier.second, hash.DigestSize()));
-
- const size_t u = hashIdentifier.second + 1;
- const size_t representativeByteLength = BitsToBytes(representativeBitLength);
- const size_t digestSize = hash.DigestSize();
- const size_t saltSize = SaltLen(digestSize);
- const byte *const h = representative + representativeByteLength - u - digestSize;
-
- SecByteBlock digest(digestSize);
- hash.Final(digest);
-
- DecodingResult result(0);
- bool &valid = result.isValidCoding;
- size_t &recoverableMessageLength = result.messageLength;
-
- valid = (representative[representativeByteLength - 1] == (hashIdentifier.second ? 0xcc : 0xbc)) && valid;
- valid = (memcmp(representative + representativeByteLength - u, hashIdentifier.first, hashIdentifier.second) == 0) && valid;
-
- GetMGF().GenerateAndMask(hash, representative, representativeByteLength - u - digestSize, h, digestSize);
- if (representativeBitLength % 8 != 0)
- representative[0] = (byte)Crop(representative[0], representativeBitLength % 8);
-
- // extract salt and recoverableMessage from DB = 00 ... || 01 || M || salt
- byte *salt = representative + representativeByteLength - u - digestSize - saltSize;
- byte *M = std::find_if(representative, salt-1, std::bind2nd(std::not_equal_to<byte>(), 0));
- recoverableMessageLength = salt-M-1;
- if (*M == 0x01
- && (size_t)(M - representative - (representativeBitLength % 8 != 0)) >= MinPadLen(digestSize)
- && recoverableMessageLength <= MaxRecoverableLength(representativeBitLength, hashIdentifier.second, digestSize))
- {
- memcpy(recoverableMessage, M+1, recoverableMessageLength);
- }
- else
- {
- recoverableMessageLength = 0;
- valid = false;
- }
-
- // verify H = hash of M'
- byte c[8];
- PutWord(false, BIG_ENDIAN_ORDER, c, (word32)SafeRightShift<29>(recoverableMessageLength));
- PutWord(false, BIG_ENDIAN_ORDER, c+4, word32(recoverableMessageLength << 3));
- hash.Update(c, 8);
- hash.Update(recoverableMessage, recoverableMessageLength);
- hash.Update(digest, digestSize);
- hash.Update(salt, saltSize);
- valid = hash.Verify(h) && valid;
-
- if (!AllowRecovery() && valid && recoverableMessageLength != 0)
- {throw NotImplemented("PSSR_MEM: message recovery disabled");}
-
- return result;
-}
-
-#endif
-
-NAMESPACE_END
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